Plumber&#39;s blowtorch



1,628,739 May 17, 1921. w F. PAGEL l PLUMBER' S BLOWTORCH Filed Aug. 4, 1925 ,wh MM/@W Patented May 17, 1927.

`uixurrsnSTATI-:s PATENT N OFFICE.

` WILLIAM F. PAGEL, F SYCAMORE, ILLINOIS.

Application mea .mgmt 4, 1923, serial no. 655,625.

My invention relates to improvements inso-called plumbers blow or hand torches and has specialreference to improvements in the construction of such torches with the object` in view of reducing the transmission of `heat from the burner to the reservoir, both for the urpose of eliminating difficulties in the uel feed resulting from over- `ip,heatinglthe reservoir and for the purpose of 1o making the `torch more durable and` more stood by referenceH to the` accompanying chawingg;` formino partof this specification and in which t e drawing` represents y a plumbers hand 1 torch embodying my invention in one form.

. In said drawing l represents the tank or reservoir of the torch and which is pressed out of sheet metalwthe cylindrical wall 2 and top 3, being `prefelably formed of one piecewithout,a seam and the `bottom 4 made of anothenpiece.` The bottom is dished upf wardly to Istrenklggthen it to withstand the y internal ressure employed in operating the torch... to the streng;theningl or stlffening of the `flat n lto i il l l op in the form shown I provide a1 hand pump 5 attachedto themen); by `rigid brackets or braces 6 and 7, throughuthelower one of which airenters thetankfrom the pump.

l l l ,At-the .oppositeside of the reservoir I in-` sert a tubular mernber ,8 which` depends within the tank, preferablyendingat about the middle of ,the hei htyof the tank. The l I 4wall 3 of the tank I deflect the lower portion uppe-lend of this tu ularymemberis ,oon-` lnecte rigidly to the top Wall 3 of the tank` andfis tightly sealed thereto. To form this connection Ipreferably reduce and external- 1 thread the upper end 9 of the tube 8. Iyprojeot the reduced end 9 up through an opening 10 in the top wall and I clamp the tube tightly to the top wall by a nut 11 screwed onto the reduced threaded end 10,

ne feature of m inventionrelates clamping thetop wall between the nut 11 and the shoulder12 formed by reducing the upper end. Finall all of the joints are thoroughly soldered, i

lower end 13 of the tube 8 `is internally as shown at 9. The

threaded lto receive the lower externally threaded end 14 of the burner feed tube 15 which leads` from the lower end of the tubej 8 to the superposed burner 16.V

The feed tube is somewhat smaller in eX- ternaldiaineter than the `internal diameter of the tube 8, thus providing a free space 17 between the ntwo which extends from the top ofthe tube 8 to the lower threaded end.

This` space is sufficient to prevent thecon` duction of heat from the feed tube to the tank except by passing clear to the `bottom v of the tube 8. The lower end of the feed tube is tightly sealed in thetube 8 by soldering as indicated at 15 and as this joint is so :far` removed from the burnerand is generally immersed in liquid, it cannot become so hot as to melt the solder, which is a source of frequent annoyance with the old type of torch in which the feed tube is soldered directly into the top wall of the tank, The annular insulation space 17 is small enough so that contact of the feed tube wit-h, the tube 8 prevents the feed tube being deflect-ed beyondv its elastic limit, and consequently immediately the pressure is removed, the feed tube `returns to its cen-A tral free position. The slight possible deflectionof the feed tube is not sufficient to the lower end of the feed tube.

In `order thatl substantially all of the liquid fuel in the tank may be fed to the tank. `As shown in the drawin A. this is ac?` vcomphshed by au extension tu e 18 which"J strain or break the soldered connection of is rigidly screwed, at its upper end, into the i lower end of the threaded lower portion 13 of the tube 8. `The lower` end 19 of the extension tube 18is open.

For the purpose of strengthening the top 2() of the tube 1S outwardly into contact with the cylindrical wall of the tank near its lower end, as showny at 21, and I securely attach the tube` to the wall of the tank preferably by means of solder,` as shown at 22.

tensiontube 18 in conjunctionwith the'tube 8 forms a tie between the top wall of the tank and the lower part thereof. In other words, I provide a tension member within the tank to assist the thin top wall of the tank in resisting the internal pressure and I do this by means of the tube which serves the additional function of feeding the fuel fromy the tank to the burner. While the means of feeding the fuel from the bottom of thev tank to the burner is shown in the drawingsL as made upV of the two tubes 1S andl, the manner in which they are connected results practically in what. may be termeda unitary feed tube extending from thebottom of the tank to the'burner. The

tank is provided, as usual in this type of torch, with a filling opening 24 in its bottom, adaptedy to be closed by a removable screw plug 25, the dis'hed bottom serving as af filling cup.

"While I have described a specific embodimentof mv invention, I do not thereby limit or confine'u my invention to thehdetailsof such Construction, the invention being broader in many aspects than the form shown 1 f and described. j Y

AI claims: Y

l. In aplumbers blow torch a sheet metal reservoir, a burner arranged above the reservoir, a ysupport tube having its upper end AHVsecured in the top wall .of the reservoir and projecting down into the reservoir, a fuel feed tube having its lower end mounted in the lower end of the support tube and the feed tube' extending freely up through the `support tube to the burner.

2. lIna device of the kind described, a fuel reservoir,a burner arranged above the reservoiiga fuel feed tube for the burner extending from the fburner down through the top ofthe reservoir and ending within the Vreser voir,"the opening in the top of the res- Wreservoira burner arranged above the reservoir, means for supporting the burner and conductingthe fuel from the reservoir to the burner comprising a feed tube connected tothe burner` and projecting down through an opening in the top wall of the reservoir, the opening spaced from the sidewall of the reservoir, asupport tube surrounding the feed tube sealed at its upper end to the top Vwallof the kreservoir and connected at its lower end to the feed tube between the top wall and the bottoni of the reservoir and an extension feed tube extending from the lower end of the support tube to the bottom of the reservoir, the lower end of the extension Vtube being connected rigidly to the body of the reservoir.

li. In a device of the kind described, a liquid fuel reservoir, a burner arranged above the reservoir, means for feeding fuel from the bottoni of the reservoir to the burner, comprising a tubular structure and composed of a feed tube connected to the burne' and extending within the reservoir, a support tube dependent within the reservoir the feed tube mounted in the lower end of the support tube and otherwise free of contact with the reservoir, and an extension feed tube connected at its upper end to the lower end of the support tube and ending at its lower end adjacent to the bottoni of the reservoir.

5. In a device of the kind described, a fuel reservoir, a feed tube extending from the burner down through an opening in the top wall of the reservoir, a support tube wit-hin the reservoir surrounding the feed tube .and free therefrom except at its lower end where they are connected, the upper end of the support tube sealed to the top wall of the reservoir, and an extension feed tube extending down from the point of connection of the two tubes to a point adjacent to the connection of the bottom of the reservoir and the side wall and its lower ond connected rigidly to the side wall of the reservoir as by soldering.

6. In a device of the kind described, a reservoir made of thin sheet metal, a burner above vthe reservoir, a tubular fuel. feed meniber structure connected at its upper end to the burner and extending down through the top wall of the reservoir and connected thereto, the lower end of the structure inetallically connected to the inner surface of: the reservoir adjacent to the connection of the bottoni and top whereby said structure serves as a tension member to straighten the top wall of the reservoir.

7. In a device of the kind described, a pressure reservoir made of thin sheet metal and having a substantially fiat top, a fuel feed tubular Vstructure extending down through the tank and permanently bonneetingthe top of the reservoir and the inner side of a wall of the reservoir adjacent to the bottoni thereof, as and for the purpose specified.

In testimony whereof, I have hereunto set my hand, this 19th day of June, 1925i.

IVILLIAM F. PAGEL. 

